\usepackage{fancyhdr, blindtext}
\usepackage{lastpage}

\pagestyle{fancyplain}

\fancyhead{}
\fancyfoot{}
\fancyhead[L]{\bf \mytitle}
\fancyhead[R]{\large OOFEM.ORG}
\fancyfoot[L]{Responsible: \myauthor}
\fancyfoot[R]{Date: \mydate\ Page:\ \thepage/\pageref{LastPage} }
\renewcommand{\headrulewidth}{0.4pt}
\renewcommand{\footrulewidth}{0.4pt}
\setlength\headheight{14pt}

\fancypagestyle{titlestyle}{%
    \fancyhead[L]{}
    \fancyhead[R]{\large OOFEM.ORG}
    \lfoot{Responsible:~\myauthor}
    \renewcommand{\headrulewidth}{0.4pt}
    \renewcommand{\footrulewidth}{0.4pt}
}
 
%Redefine chapter by adding special first chapter page page-style
%\makeatletter
%    \let\stdchapter\chapter
%    \renewcommand*\chapter{%
%    \@ifstar{\starchapter}{\@dblarg\nostarchapter}}
%   \newcommand*\starchapter[1]{\stdchapter*{#1}\thispagestyle{chapterstyle}}
%    \def\nostarchapter[#1]#2{\stdchapter[{#1}]{#2}\thispagestyle{chapterstyle}}
%\makeatother

\renewcommand{\maketitle}[1]{
    %\begin{titlepage}
        %{
        \thispagestyle{titlestyle}
        \vspace*{15em}
        \noindent{\Huge \mytitle}\\
        \noindent\rule{\textwidth}{0.4pt}\\[2em]
        {\bf Summary}\\[0.5em]
        #1
        \newpage
        %}
    %\end{titlepage}
}

